EP0452215B1 - Kaffeemaschine - Google Patents

Kaffeemaschine Download PDF

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Publication number
EP0452215B1
EP0452215B1 EP91400960A EP91400960A EP0452215B1 EP 0452215 B1 EP0452215 B1 EP 0452215B1 EP 91400960 A EP91400960 A EP 91400960A EP 91400960 A EP91400960 A EP 91400960A EP 0452215 B1 EP0452215 B1 EP 0452215B1
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EP
European Patent Office
Prior art keywords
station
coffee
cycle
infusion
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91400960A
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English (en)
French (fr)
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EP0452215A1 (de
Inventor
Jean Loup Courtois
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bonnet SA
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Bonnet SA
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Publication date
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/18—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container
    • A47J31/20—Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container having immersible, e.g. rotatable, filters

Definitions

  • the present invention relates to coffee machines for professional use which are intended to produce, at each use, an amount of coffee infusion corresponding to a tasting cup. More precisely, it relates to machines of the type comprising several infusion cups carried by a rotary support capable of successively bringing each of them to the location of a particular work station belonging to a series of stations having different functions, and which are distributed on the same circular path.
  • Patent CH 387,252 describes a machine of this kind in which three different work stations are provided following an initial coffee powder filling station, namely: a second tamping station, a third pouring station d hot water for brewing coffee and a fourth washing station, before returning to the initial station.
  • an intermediate station for packing the coffee powder between the initial coffee powder filling station and the brewing station. Consequently, at any time, a cup filled with coffee powder is in the standby parking position at the location of the tamping station while in the preceding cup an infusion of coffee is made. This is detrimental to the quality of the beverage obtained since it is not produced with a freshly ground powder, but with a powder which has been able to park for a certain time at the location of the intermediate station, if the machine is not not used continuously.
  • a machine of this kind has the drawback that fouling of the infusion cups quickly occurs.
  • the washing carried out within the framework of a normal operating cycle for the production of coffee drinks, cannot be sufficiently effective in removing all the particles of coffee powder attached to the walls of the brewing cups, especially since it is impossible to introduce detergents.
  • the machines of the type in question which currently exist, include particularly complex mechanisms, which increases their cost price as well as the risk of breakdowns. This is particularly the case in the machine according to CH 387.252.
  • the infusion cups are distributed around the periphery of a tray which undergoes, each time it is used, a series of different movements: an axial downward movement, a partial rotational movement and an axial upward movement . This therefore implies the presence of a particularly complex mechanism with the resulting drawbacks, both in terms of cost price and in terms of reliability.
  • the cup which has received a dose of freshly ground coffee powder immediately passes to the brewing station at the place where the pre-packing of the powder is also carried out.
  • the coffee infusion is always carried out with freshly ground powder, which makes it possible to obtain a coffee of better quality than in previous machines of the same kind.
  • the risks of fouling are eliminated due to the existence of a particular cleaning cycle, which is distinct from the normal cycle for producing coffee drinks, and which allows perfectly effective cleaning.
  • the mechanisms of the present machine are particularly simple since the rotary support of the brewing cups only performs a partial movement. of rotation each time the machine is started, both in the case of the particular cleaning cycle and in that of the normal cycle for producing coffee drinks.
  • control device thereof automatically initiates the cleaning cycle at each complete stop of the operation of the machine, this cycle can also be triggered by the user at any other time chosen by it.
  • each infusion cup has a removable lower filter, and there is provided, in the particular cleaning cycle, an additional station located after the hot water pouring station, this additional station being arranged to allow the removal of the removable parts provided in each brewing cup, including the lower filter, in order to be able to possibly carry out their complete cleaning by hand. This therefore radically eliminates any risk of fouling of the present machine.
  • the machine shown comprises only two cups 1a and 1b of brewing coffee, which are arranged in diametrically opposite positions on a common support 2 which can take the form of a simple bar connecting these two cups.
  • the assembly consists of a single piece of molded metal alloy.
  • This assembly is removably mounted on a vertical shaft 3 disposed in the center and which is capable of driving it in rotation. This fixing can be ensured by a wing nut 4 or any other easily removable fixing member.
  • Each bucket 1a or 1b contains, at its bottom, a piston 5 pierced with a number of holes and which is provided with a removable grid 6 for filtration.
  • This piston is carried by a rod 7 freely slidably mounted in a bore 8 provided in the bottom of the corresponding cup. In its normal position the piston 5 rests against the bottom of this cup and is thus located above a nozzle 9 for output of the infusion liquid. In this position, the rod 7 of the filtration piston projects below the corresponding cup, its lower end then being supported on a circular track 10 whose role will be explained below.
  • the drive of the rotary shaft 3 is ensured by means of an electric motor 12.
  • This consists of a motor of a type particular, in this case a so-called "stepping motor”, which is controlled by a control unit capable of supplying the pulses necessary to determine angular displacements of precise amplitude for the rotary support 2 of the two buckets 1a and 1b. This therefore makes it possible to successively bring each of these buckets to the location of a particular work station belonging to a series of stations having different functions.
  • the machine according to the invention has the particularity of comprising two distinct series of work stations which belong to two different operating cycles, namely a normal operating cycle for making coffee drinks, and a second particular cleaning cycle.
  • the different positions of these two series are distributed angularly on the same circular path 13 whose center O coincides with that of the shaft 3, at least one of these positions may be common to the two work cycles.
  • FIG. 2 represents the respective angular positions of these three stations, it being understood that the support 2 of the filtration buckets is rotated in the direction of the arrow F.
  • the engine control unit 12 is capable of printing a half turn of rotation each time on the support 2 so as to pass each brewing cup directly from the filling station A to the brewing station. B.
  • the other bucket obviously passes from station B to station A, without there being parking at the location of station C for evacuating the coffee grounds. This is moreover essential so that the cup which has just received coffee powder at station A passes directly to the brewing station B.
  • this station B is designed to ensure both the pre-packing of the coffee powder and then the pouring of the dose of hot water intended for the infusion.
  • the packing operation is ensured by a pressing piston 18 provided with a removable grid 19.
  • the rod 20 of this piston is slidably mounted in a guide block 21 and it is driven in movement by means of a pinion 22 meshing with a screw-nut system 23.
  • This pinion is itself driven by a direct current electric motor 24. Given this fact, we can know the torque that this motor develops by simply measuring the intensity of the current it crosses. This therefore makes it possible to determine the conditions under which the ground coffee is packed. Moreover, it is thus possible to memorize the value of the intensity to be expected for a possible compaction of the coffee powder. No matter how much coffee is placed in the corresponding brewing cup, you can always have packed powder in the same way.
  • each brewing cup immediately passes from station A to station B, the coffee is brewed from freshly ground coffee powder. This therefore makes it possible to obtain, for the drink produced, a much better quality than in current machines of the same kind.
  • the station C for evacuating the coffee grounds M is a station at the point where each cup 1a and 1b only passes without stopping.
  • the circular track 10 already mentioned has a raised portion 10c on either side of which are provided connection ramps 10a and 10b.
  • the control unit of this machine is programmed so that, during the execution of the particular cleaning cycle, there is no spillage of coffee powder at the location of the initial station A and the pressure piston 18 does not come into action at the position of station B.
  • this unit is also programmed so as to print in such a case angular displacements different from those provided in the case of the normal operating cycle, so that each bucket either have to park successively at the location of the various stations A, B, D and E.
  • the latter station E it should be noted that it is provided above the raised part 10c of the circular track 10.
  • the piston 5 is pushed back above the corresponding bucket 1, as shown on the right-hand side of FIG. 5.
  • the removable grid 19, fitted to the pressure piston 18, can also be dismantled for cleaning outside the machine.
  • the piston 18 it can be easily cleaned when a cup 1a or 1b is at the location of the dismantling station E. In fact in such a case, the station B is freed from the presence of any infusion cup since those -ci are arranged in diametrically opposite positions. It is then very easy to access this pressure piston 18 to clean it completely.
  • the control unit of this machine is arranged so as to automatically control the triggering of the particular cleaning cycle when each complete stop of operation of the machine, for example at the end of the day or when the beverage outlet equipped with this machine is closed.
  • the control unit allows the user to also initiate this cleaning cycle himself, at any time chosen by him, for example if he judges that there is a risk of clogging of filters and buckets. 'infusion.
  • the rinse cycle which exists in addition to the normal operating cycle and the cleaning cycle, uses the stations of the first of these two cycles. However, during the execution of this rinsing cycle, the control unit of the machine suppresses the operation of pouring coffee powder at the location of the initial station A, as well as the tamping operation at the station B There is therefore only a spill of hot water at the location of station B, which ensures the intended flushing.
  • the machine control unit is slaved to a system capable of controlling the duration of filling a cup of coffee, and the arrangement is such that when this duration exceeds a predetermined time, corresponding to the normal time d flow of water through the coffee powder, this control system acts on the control device so that the latter then initiates the rinsing cycle. So as soon as there is a beginning of stagnation of spent coffee powder residues, causing an increase in the time for water to flow through the coffee powder, this automatically triggers a rinsing cycle, thereby avoiding all risk of fouling.
  • the control unit also allows this rinsing cycle to be triggered voluntarily by the user at any time chosen by him.
  • the machine control unit therefore comprises a microprocessor in order to supply the pulses necessary for this motor, the assembly also comprising a sequencer and a power supply.
  • control unit comprising a microprocessor makes it possible to store numerous parameters in said microprocessor in order to control several elements of the machine.
  • control unit can control the coffee grinder 15 by operating it for a predetermined period in order to obtain the desired quantity of ground coffee.
  • this control unit is designed to initiate the cleaning cycle and that of the rinsing cycle under the conditions already described.
  • the coffee machine according to the invention is not limited to the embodiment described above.
  • only two infusion cups are provided, located in diametrically opposite positions on their rotary support 2, in which case the two stations A and B of the normal cycle, are also located in diametrically opposite positions so that there is a direct passage from each bucket from station A to station B.
  • the rotary support 2 could carry a greater number of brewing cups by providing appropriate angular positions of the two stations A and B so that there is always direct passage of each cup from the initial station A to the brewing station B without intermediate stop. In such a case, during the normal operating cycle, there would be intermediate stops on the return journey from station B to station A, without these stops corresponding to personal work places.
  • the coffee machine according to the invention is more particularly intended to be used in drinking places, or in community restaurants, or the like, for the supply of coffee drinks to consumers.
  • the coffee machine thus described comprises an improvement which makes it possible to better control the compaction of the coffee powder.
  • the pressure piston 18 has over its entire periphery a seal in order to obtain a good seal between the pressure piston 18 and the internal wall of the cups 1a or 1b.
  • This arrangement has the disadvantage that the seal rubs against the cup walls and that this friction adds an additional force to overcome for the motor 24, a force which is not constant so that the compaction of the coffee is not constant.
  • the pipe 25, instead of being a fixed pipe which opens freely above the piston 18, has a flexible part 25a which is fitted on a tube 25b which is crimped in a bore 18a of piston 18.
  • This bore 18 communicates, via a pipe 28, with on the one hand a radial pipe 29 which opens into a groove 30 and on the other hand a plurality of pipes 31 through which the hot water will flow into the coffee powder contained in well 1.
  • the groove 30 is a circular groove, formed around the entire periphery of the piston 18. In this groove is disposed a seal 32 which is hollow and which communicates through an orifice 33 with the pipe 29.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)
  • Tea And Coffee (AREA)

Claims (8)

  1. Kaffeemaschine mit mehreren Aufgußbehältern, die auf einem Umlaufträger angeordnet sind, wobei der Träger geeignet ist, nacheinander jeden dieser Aufgußbehälter an eine bestimmte Arbeitsgangstation zu bewegen, die zu einer Reihe von Arbeitsgangstationen mit verschiedenen Funktionen gehört, darunter eine Füllstation für das Kaffeepulver und eine Wassereingießstation für das Aufgießen des Kaffees; dadurch gekennzeichnet, daß sie zwei Reihen von Arbeitsgangstationen beinhaltet, die zu zwei verschiedenen Betriebskreisläufen gehören und auf derselben Kreisbahn laufen:
    a) für einen normalen Betriebsdurchlauf nacheinander:
    - eine Anfangsfüllstation (A) für das Kaffeepulver,
    - eine zweite Arbeitsgangstation (B), an welcher sofort im Anschluß gleichzeitig das Pulver verdichtet und die für den Aufguß des Kaffees vorgesehene Menge heißen Wassers eingegossen wird; das Bedienungselement zur Bewegungssteuerung des Umlaufträgers mit den Aufgußbehältern (1a, 1b) ist dazu geeignet, jeden Behälter ohne Zwischenstopp direkt von der Anfangsfüllstation (A) zur Arbeitsgangstation (B) zu bewegen.
    - eine dritte Arbeitsgangstation (C), an welcher der Kaffeesatz ohne Anhalten des Umlaufträgers der Aufgußbehälter in einer Drehbewegung desselben entleert wird.
    b) für einen speziellen Reinigungsdurchlauf nacheinander:
    - eine Abgabestation (D) für ein Reinigungsmittel, die zwischen den beiden ersten Arbeitsgangstationen (A und B) des normalen Betriebsdurchlaufs liegt,
    - eine Heißwassereingießstation für den eigentlichen Reinigungsvorgang; wobei diese Station von der zweiten Arbeitsgangstation (B) des normalen Betriebsdurchlaufs gebildet ist.
  2. Kaffeemaschine nach Anspruch 1, dadurch gekennzeichnet, daß jeder Aufgußbehälter (1a und 1b) einen herausnehmbaren Filterunterkolben (5) aufweist, der mit einem abnehmbaren Gitter (6) versehen ist, wobei innerhalb des speziellen Reinigungsdurchlaufs eine zusätzliche Arbeitsgangstation (E) vorgesehen ist, die hinter der Heißwassereingießstation liegt, und wobei diese zusätzliche Arbeitsgangstation (E) sich dort befindet, um das Entfernen der herausnehmbaren Teile zu ermöglichen, die Bestandteil jedes Aufgußbehälters sind, um eventuell per Hand eine vollständige Reinigung vorzunehmen.
  3. Kaffeemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ihr Bedienungselement automatisch bei jedem völligen Betriebsstillstand der Maschine den speziellen Reinigungsdurchlauf startet, dieser Arbeitsgang kann jedoch auch zu jedem beliebigen Moment vom Benutzer gestartet werden.
  4. Kaffeemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie zusätzlich einen Spüldurchlauf ausführt, der dieselben Arbeitsgangstationen betrifft wie der normale Betriebsdurchlauf, jedoch mit dem Unterschied, daß bei der Ausgangsstation (A) keine Ausschüttung von Kaffeepulver stattfindet, und daß das Bedienungselement gekoppelt ist an eine Zeitkontrolle für die Dauer einer Füllung einer Tasse Kaffee, die so ausgelegt ist, daß dieses Kontrollsystem auf das Bedienungselement einwirkt und bewirkt, daß dieses den Spüldurchlauf startet, wenn dieser Vorgang eine vorab festgelegte Zeitspanne überschreitet.
  5. Kaffeemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie im Bereich der zweiten Arbeitsgangstation (B) des normalen Betriebsdurchlaufs über einen Druckkolben (18) verfügt, der einer verbesserten Verdichtung des Kaffeepulvers dient und von einem Gleichstrommotor (24) angetrieben wird, der wiederum mit Kontrollmechanismen ausgestattet ist, die es erlauben, mittels der Größe des über den Motor laufenden Stroms den Grad der Verdichtung des Kaffeepulvers genau zu bestimmen.
  6. Kaffeemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Träger (2) der beiden Aufgußbehälter (1a und 1b) abnehmbar auf einer senkrechten Welle (3) sitzt, die von einem als Schrittmotor ausgebildeten Elektromotor (12) in Drehbewegung versetzt wird, wobei die Befestigung dieses Trägers (2) mittels einer Flügelmutter (4) oder eines anderen leicht zu entfernenden Befestigungselements erfolgt.
  7. Kaffeemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kolben (18) mit einer Hohldichtung (32) versehen ist, die sich mittels dem von der Pumpe gelieferten heißen Wasser ausdehnt, so daß der Kolben (18) derartige Abmessungen aufweist, daß er reibungslos in den Behälter ein- und aus ihm austreten kann.
  8. Kaffeemaschine nach dem Patentanspruch 7, dadurch gekennzeichnet, daß die Dichtung (32) über das Innere des Kolbens (18) mit einer flexiblen Zuleitung (25a) für heißes Wasser verbunden ist.
EP91400960A 1990-04-12 1991-04-10 Kaffeemaschine Expired - Lifetime EP0452215B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004720 1990-04-12
FR9004720A FR2660850B1 (fr) 1990-04-12 1990-04-12 Machine a cafe.

Publications (2)

Publication Number Publication Date
EP0452215A1 EP0452215A1 (de) 1991-10-16
EP0452215B1 true EP0452215B1 (de) 1994-06-08

Family

ID=9395712

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EP91400960A Expired - Lifetime EP0452215B1 (de) 1990-04-12 1991-04-10 Kaffeemaschine

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EP (1) EP0452215B1 (de)
AT (1) ATE106690T1 (de)
CA (1) CA2060085A1 (de)
DE (1) DE69102337D1 (de)
FR (1) FR2660850B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5490447A (en) * 1989-07-05 1996-02-13 Faema S.P.A. Automatic espresso and cappuccino machine
ES2065787B1 (es) * 1991-05-13 1995-10-16 Azkoyen Hosteleria Perfeccionamientos en maquinas automaticas expendedoras de infusiones de cafe.
ES2054573B1 (es) * 1991-05-13 1995-02-01 Azkoyen Hosteleria Mejoras introducidas en la patente de invencion n{ 9101161 por: "perfeccionamientos en maquinas automaticas expendedoras de infusiones de cafe.
NL9300913A (nl) * 1993-05-27 1994-12-16 Sara Lee De Nv Werkwijze en inrichting voor het bereiden van een drank.
US5911810A (en) * 1997-06-23 1999-06-15 Sanden Corp. Coffee brewing apparatus and method of brewing coffee by the apparatus
CN2542169Y (zh) * 2002-04-14 2003-04-02 广东德豪润达电气股份有限公司 咖啡酿造装置
ES2649178T3 (es) 2015-02-04 2018-01-10 Tuttoespresso S.R.L. Unidad de elaboración para una máquina de distribución de bebidas
JP7157614B2 (ja) * 2018-10-04 2022-10-20 ツインバード工業株式会社 コーヒーメーカー及びその制御方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU40768A1 (de) * 1961-10-31 1963-05-02

Also Published As

Publication number Publication date
CA2060085A1 (en) 1993-07-28
FR2660850B1 (fr) 1992-07-24
EP0452215A1 (de) 1991-10-16
DE69102337D1 (de) 1994-07-14
ATE106690T1 (de) 1994-06-15
FR2660850A1 (fr) 1991-10-18

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